code: def test_neg_arg(self):
      assert_raises(ValueError, _faa_di_bruno_partitions, -1)
      assert_raises(ValueError, _faa_di_bruno_partitions, 0)
  
imports: import warnings
  import numpy
  from numpy.testing import assert_equal, assert_raises, assert_allclose
  import numpy.testing
  from scipy.special import gamma, factorial, factorial2
  import scipy.stats
  from statsmodels.distributions.edgeworth import _faa_di_bruno_partitions, cumulant_from_moments, ExpandedNormal
label_desc: Use image node_id 1 for calling the TestFaaDiBruno obj's underlying member method code with example usage: obj.test_neg_arg() without return types